"B roads in Northern Ireland" . . "Road Traffic Regulation (Northern Ireland)" . . "B roads" . . . . . "B" . . . . "Road Traffic (Northern Ireland) Order" . . "Roads (Northern Ireland) Order" . "Roads in Northern Ireland" . . . . . "Roads and Road Traffic (Northern Ireland)" . . "Roads (Northern Ireland)" . . "primary route (A) roads" . . "Northern Ireland" . . . "Roads Act (Northern Ireland)" . . "Roads (Northern Ireland" . . "Road Traffic, Transport and Roads (Northern Ireland)" . . . . "(Northern Ireland)" . . "Road" . . . . . . . . "Roads in Northern Ireland" . "roads linking Northern Ireland" . .